GC and H1B is two different things. GC is future job by sponsored compan, willing to offer job position. As long you meet the Criteria, there should not be any issue, I guess.GC is a lengthy process, make sure your company hire the right lawyer who has an experience of GC processing, file for right PWD and company is willing to offer you that salary. Rest your lawyer will take care of everything needed. All the best buddy.